Universal aerial and die-mount cams, each having an adapter assembly, a driver, and a slide sandwiched between the adapter assembly and the driver. The adapter assembly has a universal adapter having an arcuate portion that is angularly adjustable within arcuate recesses in opposing side plates of the universal adapter so that bearing surfaces of the universal adapter slidably oppose a first group of bearing surfaces of the slide and a second group of bearing surfaces of the slide slidably oppose bearing surfaces of the driver, the latter bearing surfaces being parallel to or inclined to the horizontal. Three ranges of longitudinal driver inclination angles can be accommodated by using the same slide and universal adapter and one of two pairs of side plates.